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Re: LF: 136 Khz opera 32 deep search last night km07ks

To: <[email protected]>
Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks
From: "Graham" <[email protected]>
Date: Wed, 22 Oct 2014 17:59:30 +0100
Importance: Normal
In-reply-to: <[email protected]>
References: <6BF0F1135DB44D52AFFF0448CE54FD98@eplwin764i3> <[email protected]> <6CE5DBDE1EBF4CAA9A3B3F612F772E13@AGB> <[email protected]> <15A01213EC1F407896E69F7871909E98@AGB> <[email protected]>
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Ok Joe,

Dont forget , you can run the windows Opera software on 'any web linked pc' not linked to the radio/tx and recover your spots , also if you set the programme to tx , it will place the TX marker on the psk-map and alert other monitors your sending . just match the band , if your not on the pre-set dial qrg ( + 1500 Hz ) , add the qrg to the web beacon

478.477 :: Yes that looks ok , aim off from the mid band 478.500 with +/- 50 Hz pass band , the 100 hz Op uses is clear this side ..

2200 from last night , there where a few stations showing East USA , but Mr Sod and his law's , no one about last night !


G3XDV               2200m       OPERA   3720 km 03:36:51
G0KTN               2200m       OPERA   3587 km 06:31:55
G4WGT   2200m   OPERA   3519 km 07:06:57
GW0EZY  2200m   OPERA   3490 km 02:26:54


73-Graham,

--------------------------------------------------
From: <[email protected]>
Sent: Wednesday, October 22, 2014 5:14 PM
To: <[email protected]>
Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks

Thanks, G..

I have changed my tune. It seems one gets more attention when singing in key! Thanks to GW0EZY for the report and the other OP32 grabbers and to
you G. for your help and the new OP bands.  Is 478.477 a good choice
for OP8?

73
Joe VO1NA

On Mon, 20 Oct 2014, Graham wrote:

Ok Joe ,

I wondered why you where missing from the map , for last nights sing along !

600 mtrs mid band qrg now 478.500 with +/- 50 Hz pass band , still 477.000 USB . but the pass band has been centred on 1500 Hz

73-G,


--------------------------------------------------
From: <[email protected]>
Sent: Monday, October 20, 2014 1:01 PM
To: <[email protected]>
Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks

Hi Markus and Graham,

Thanks for the info on op.  I'll look for a lower QRG in
the passband for 2200m OP32.  Hopefully 478.65 is still OK for OP8.

It is planned to add 630m to the 2200m exciter by replacing the
CMOS 4020 (divide by 16) with a faster 74LS161.  The DDS output is
set at 16f and then divided to improve the resolution and square the output, but 16x479 kHz is too fast for the 4020.

Thank-you to IZ7SLZ and SV8RV for their reception reports.

73
Joe VO1NA


On Sun, 19 Oct 2014, Graham wrote:

Hi Joe ,

Quite possibly ,

One  of the  unintended  consequences  of  NED !

[ Never  Ending Development]

The last major upgrade to Opera , saw the removal of dual speeds for each band and the audio being centred on 1500 Hz

That put the mid band Rf-QRG at 137.500 with decoder pass band +/- say 45 Hz

However , decode threshold and false decodes are improved , with some decodes showing with fade losses of 60%

477K is now  set  at  OP8    478.500  KHz


73-Graham

--------------------------------------------------
From: <[email protected]>
Sent: Sunday, October 19, 2014 7:26 PM
To: <[email protected]>
Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks

Thanks Dionysios and Terry GW0EZY for the reports of the OP transmissions.
Thanks also to DF6NM for his grabber and accurate freq measurements.
It seems many OP stations have migrated down about 50 Hz.  Did I miss
something?

The TX was running 240 watts 2.2 amps to the 100 m wire.  Will be QRV
& QRO again tonight.

73
Joe VO1NA

On Sun, 19 Oct 2014, Dionysios Vlachiotis wrote:

sv8rv km07ks Opera-32 correlation

date time call distance frequency bandwidth snr correlation

2014-10-19 03:54:24 VO1NA 5905km 137554.746Hz 2mHz -47.6dBOp 92% 15.1dB 2014-10-19 01:34:22 VO1NA 5905km 137554.746Hz 2mHz -47.0dBOp 84% 16.7dB 2014-10-18 22:58:33 DF6NM 1510km 137507.749Hz 2mHz -29.9dBOp 97% 20.0dB 2014-10-18 22:50:32 G3XDV 2266km 137529.800Hz 4mHz -39.3dBOp 100% 20.3dB 2014-10-18 20:34:20 G3XDV 2266km 137529.800Hz 2mHz -41.7dBOp 92% 19.9dB 2014-10-18 19:55:44 DF6NM 1510km 137507.749Hz 2mHz -33.0dBOp 88% 19.7dB 2014-10-18 18:24:46 G3XDV 2266km 137529.797Hz 9mHz -46.7dBOp 91% 17.7dB



73 de SV8RV
Dionysios Vlachiotis
Zakynthos (Zante) island GREECE








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